# CVE-2026-101027: Gitea migration SSRF through ALLOWED_DOMAINS address check bypass

> Attackers can bypass SSRF protections in Gitea migrations by controlling DNS for allowed domains, accessing internal services when ALLOWED_DOMAINS is configured.

- **Severity:** High 7.7 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 6 Oct 2026
- **Updated:** 7 Oct 2026
- **Also known as:** BIT-gitea-2026-101027, GHSA-fqjr-23c8-gg9m, MINI-cx62-rhf2-fx26, MINI-gr2v-v628-56qc

## What is CVE-2026-101027?

CVE-2026-101027 is a high-severity server-side request forgery vulnerability in Gitea Gitea, published on 6 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

When `[migrations] ALLOWED_DOMAINS` was configured, a hostname matching the allow list was accepted without checking its resolved address against the local-network restrictions. A user who can start repository migrations and control the DNS of an allowed hostname could make it resolve to loopback or private addresses and bypass `ALLOW_LOCALNETWORKS = false`, reaching internal services from the Gitea server. Instances without `ALLOWED_DOMAINS` configured are not affected by this specific bypass.

Weakness: CWE-346 (Origin Validation Error)

## Which versions are affected by CVE-2026-101027?

1 open source package ship an affected version, including gitea. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `gitea` | Bitnami | All versions | 28.0.0 |

Products: Gitea Gitea.

## How do I fix CVE-2026-101027?

Upgrade gitea to 28.0.0 or later.

## Is CVE-2026-101027 being exploited?

There is no known exploitation of CVE-2026-101027 in the wild and no public exploit code.

## Other vulnerabilities in Gitea Gitea

- [CVE-2026-60004](https://insights.sbomify.com/CVE-2026-60004/): Gitea Code Injection (critical 9.8, exploited in the wild)
- [CVE-2026-73278](https://insights.sbomify.com/CVE-2026-73278/): Gitea WebAuthn bypass during OAuth and OIDC sign-in (critical 9.8)
- [CVE-2026-94205](https://insights.sbomify.com/CVE-2026-94205/): Gitea fork workflow approval bypass through maintainer-triggered events (critical 9.8)
- [CVE-2022-42968](https://insights.sbomify.com/CVE-2022-42968/): Gitea vulnerable to Argument Injection (critical 9.8)
- [CVE-2021-45330](https://insights.sbomify.com/CVE-2021-45330/): Improper Privilege Management in Gitea (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-101027 and fix it if it is affected.

What it is: CVE-2026-101027 is a high-severity server-side request forgery vulnerability in Gitea Gitea, published on 6 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-101027 in the wild and no public exploit code.

Affected packages and fixed versions:
- gitea (Bitnami): affected all versions; fixed in 28.0.0

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-101027/ (Markdown: https://insights.sbomify.com/CVE-2026-101027/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-101027
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-101027
- OSV: https://osv.dev/vulnerability/CVE-2026-101027

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-101027/
Summaries are generated and may contain mistakes; the official description above is the record.